Cheapest one-way flights from Washington to Lisbon in May from 306€

AirHint found the following cheapest one-way flights from Washington (IAD) to Lisbon (LIS) in May 2026 (see full year).

One-Way flights

08 May Icelandair
03 May Icelandair
09 May Icelandair
26 May Icelandair
19 May Porter Airlines (Canada) Ltd
13 May Icelandair
06 May Icelandair
12 May Porter Airlines (Canada) Ltd
24 May Porter Airlines (Canada) Ltd
31 May Porter Airlines (Canada) Ltd

Also check the deals for return flights from Washington to Lisbon in May.

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The deals are updated regularly. The prices may go up as tickets are purchased by other travellers. Only the cheapest flights are offered. Select a price to book and secure these cheap prices.

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